发明名称 |
VERFAHREN ZUR HERSTELLUNG VON ORGANISCHEN MONOUND POLYISOCYANATEN DURCH THERMISCHE ZERSETZUNG EINES TRISUBSTITUIERTEN HARNSTOFFES |
摘要 |
A process for the preparation of organic mono- and polyisocyanates is described, in which a hydrogen chloride adduct of a trisubstituted urea is thermally decomposed to form the isocyanate. The hydrogen chloride adduct at minimum contains the stoichiometric amount of HCl, and at maximum a 10 mole-% excess. The process is carried out in a closed system at a temperature between about 80 DEG and 180 DEG C.; the reaction is effected either in a melt or in the presence of an inert organic solvent. |
申请公布号 |
AT362773(B) |
申请公布日期 |
1981.06.10 |
申请号 |
AT19790004812 |
申请日期 |
1979.07.10 |
申请人 |
AKZO NV |
发明人 |
HENTSCHEL PETER DR.;ZENGEL HANS DR.;BERGFELD MANFRED DR. |
分类号 |
C07C265/00;C07C;C07C67/00;C07C241/00;C07C263/06;C07C265/04;C07C265/12;C07D213/72;C07D219/08;(IPC1-7):07C119/042 |
主分类号 |
C07C265/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|